Question

express sina and seca in terms of tana?​

Answer 1

Answer:

sec a = √1- tan^2 a

sin a/ cos a= tan a

or, sin a = tan a. cos a

= tan a. (1-tan^ a / 1+ tan^2 a)

[since, cos 2a= 1-tan^2 a/1+tan^2 a]